低频压电检波器的研究
发布时间：2018-08-08 22:02
【摘要】：随着油气田勘探开发的不断深入,勘探目标转为复杂油气藏。地震勘探也发展到的“两宽一高”(即宽方位、宽频带、高密度)高精度三维勘探。宽频地震勘探技术可以提高深层低频信号的获取能力,获得高分辨率图像,提高成像清晰度,从而发现更多的地层结构和地质构造,最终提高物探公司在同行中的竞争力。要实现宽频采集,就要把检波器接收频谱向低端拓展。本文总结和研究了国内外压电检波器工作原理,对现有的dB25-10Hz压电检波器进行深入的分析和讨论,并参考法国SERCEL公司SG-5Hz动圈检波器的技术指标,从而经过论证确定了压电传感器和阻抗匹配器的使用材料,以及阻尼电阻、灵敏度、自然频率、绝缘电阻等相关参数。另外,还设计出几种类型的测试产品,通过权威单位的检测和野外地震资料的采集试验,最终确定了一种适合滩浅海使用的低频压电检波器。针对这种检波器,制定出检测指标和制作工艺流程,并设计出便携式低频压电检波器测试仪。低频压电检波器的研制为实现宽频采集迈出了第一步,也为以后的双检检波器制造奠定了基础。
[Abstract]:With the deepening of exploration and development of oil and gas fields, exploration targets become complex oil and gas reservoirs. Seismic exploration has also developed into "two widths and one height" (i.e. wide azimuth, wide frequency band, high density) and high precision 3D exploration. Broadband seismic exploration technology can improve the acquisition ability of deep low frequency signals, obtain high resolution images, improve imaging clarity, and thus discover more stratigraphic structures and geological structures, and finally enhance the competitiveness of geophysical companies in the same trade. In order to achieve broadband acquisition, the receiver spectrum of geophone must be extended to the low end. In this paper, the working principle of piezoelectric geophone at home and abroad is summarized and studied. The existing dB25-10Hz piezoelectric detector is analyzed and discussed in depth, and the technical index of SG-5Hz movable coil detector of France SERCEL company is referred to. The materials used in piezoelectric sensors and impedance matchers, as well as the parameters of damping resistance, sensitivity, natural frequency, insulation resistance and so on are determined. In addition, several types of test products are designed, and a low-frequency piezoelectric geophone suitable for shoal and shallow water is finally determined by the testing of authoritative units and field seismic data collection. For the detector, the detection index and manufacturing process are worked out, and a portable low frequency piezoelectric detector tester is designed. The development of low frequency piezoelectric geophone is the first step to realize broadband acquisition, and it also lays a foundation for the manufacture of double detector.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P631.436
本文编号：2173174
[Abstract]:With the deepening of exploration and development of oil and gas fields, exploration targets become complex oil and gas reservoirs. Seismic exploration has also developed into "two widths and one height" (i.e. wide azimuth, wide frequency band, high density) and high precision 3D exploration. Broadband seismic exploration technology can improve the acquisition ability of deep low frequency signals, obtain high resolution images, improve imaging clarity, and thus discover more stratigraphic structures and geological structures, and finally enhance the competitiveness of geophysical companies in the same trade. In order to achieve broadband acquisition, the receiver spectrum of geophone must be extended to the low end. In this paper, the working principle of piezoelectric geophone at home and abroad is summarized and studied. The existing dB25-10Hz piezoelectric detector is analyzed and discussed in depth, and the technical index of SG-5Hz movable coil detector of France SERCEL company is referred to. The materials used in piezoelectric sensors and impedance matchers, as well as the parameters of damping resistance, sensitivity, natural frequency, insulation resistance and so on are determined. In addition, several types of test products are designed, and a low-frequency piezoelectric geophone suitable for shoal and shallow water is finally determined by the testing of authoritative units and field seismic data collection. For the detector, the detection index and manufacturing process are worked out, and a portable low frequency piezoelectric detector tester is designed. The development of low frequency piezoelectric geophone is the first step to realize broadband acquisition, and it also lays a foundation for the manufacture of double detector.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P631.436
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